Guangyuan Yu@gy121Follow BadgesProblem SolvingSql CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillWork Experiencegy121 has not updated employment details yet.Educationgy121 has not updated education details yet.Linksgy121 has not updated links details yet. Skillsgy121 has not updated skills details yet.